Which the thickest layer of the earth ? *Write the answer in one line
The Correct Answer and Explanation is:
The thickest layer of the Earth is the mantle.
The Earth’s structure consists of several distinct layers: the crust, mantle, outer core, and inner core. Among these, the mantle is the thickest. It extends from the base of the Earth’s crust (about 5-70 km deep) to the outer core at a depth of approximately 2,900 km. This makes the mantle about 2,880 km thick, while the crust, which is the outermost layer, is significantly thinner, averaging around 30-40 km thick under continents and about 5-10 km thick under the oceans.
The mantle is composed mainly of silicate rocks that are rich in magnesium and iron. It is divided into two regions: the upper mantle and the lower mantle. The upper mantle, in contact with the crust, contains partially molten rocks and plays a key role in plate tectonics, with convection currents driving the movement of tectonic plates. The lower mantle is more rigid but still experiences slow movement due to the high pressure and temperature.
Despite its thickness, the mantle is not static. Its convective movement (due to heat from the core) causes the circulation of material, which in turn drives tectonic activity such as earthquakes, volcanic eruptions, and mountain formation. The mantle’s thickness and composition are crucial in shaping the geological processes of the Earth’s surface. The Earth’s outer core, although hotter, is liquid, and the inner core is solid, contributing to the dynamism of Earth’s internal structure.
